As a server, | I want to handle get images request

[C E L L]

AC:

• Create GET /images that receives params:

Name	Description
page	Page number to retrieve (default = 1)
per_page	Number of images to retrieve per page (default = 10)
order_by	How images are ordered latest or oldest (default = latest)

• Validate the params page & per_page should be a number and order_by should be latest or oldest
• Set params to default values if they don't exist
• Return success message if all params are okay
• If any params are not valid return a descriptive error message